Combined sash or door lock and burglar-alarm



J. R. SANDB'ERG.

COMBINED SASH 0R DOOR LOCK AND BURGLAR ALARM.

APPLICATION FILED MAYI. 1920.

1,358,249. Patented Nov. 9, 1920 fla fl mfrwefibr',

@Y 16 I jior/aam PATENT OFFICE.

JOHN R. SAITDBEBG, 01? DENVER, COLORADO.

COMBINED SSH OR DOOR LOCK AND Specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed my 1, 1920. Serial No. 378,173.

'1 '0 all whom it may concern:

Be it known that'I, JOHN R. SANDBERG, a citizen of the United States of America, residing at the city and county of Denver and State of Colorado, have invented a new and useful Combined Sash or Door Lock and Burglar-Alarm, of which the following is a specification.

This invention relates to improvements in combined sash or door locks and burglar alarms.

The object of the invention is to provide a device of this character, which is pri-. marily adapted for locking a window sash at any desired point in its upward movement, said lockingdevicebeing electrically connected in circuit with a bell in such manner that any attempt to move the window in either direction results in closing a circuit through the bell, which is thereby rung.

Further, to providea sash lock comprising a fixed member which is secured to the lower sash, having a' movable member, which is slidably connected to a rod secured on the upper sash and adapted to be locked thereto, said fixed and movable members being electrically connected in circuit with a bell, whereby a slight movement of the window in either direction causes contact between the fixed and movable members, by which a circuit is closed through the bell.

These objects are accomplished by the del vice illustrated in the accompanying drawings, in which: v

Figure 1 is a vertical, sectional view through the upper and lower sashes ofv a window, showing the application of the improved locking device thereto- Fig. 2 is a front viewfull size-showing the locking member which is secured to the upper rail of the lower sash, and a portion of the rod to which the locking member is' adapted to be locked, and which is secured at one end to the upper sash.

Fig. 3 is a front view of the locking member, the cover plate being removed to show the inclosed mechanism.

Fig. 4 is a transverse, sectional view on the line 4--4 of Fig. 2.

Fig. 5 is a front view, partly in section, of the lock member casing, showing the manner of insulating therefrom, a contact which is secured to the side of said casing, and

Fi 6 is a side view of the slide block which is'mounted in the casing, and which is adapted to be locked to the rod on the upper sash, which passes through said b ock.

Referring to the accompanying drawings:

The numeral 1 designates the upper sash of a wmdow, and 2, the lower sash thereof. To the upper rail 3, of the upper sash, and near one end of the same, is secured a plate 4, havin a projecting hub 5, which is provided with a threaded aperture in which is screwed the horizontally bent end portion 6, of 'a vertically dependlng rod 7, which extends to a point slightly below the upper rail 8, of the lower sash 2, when the same sash is closed, or at the limit of its downward movement. Upon the upper rail 8, of the lower sash, and in vertical line with the rod 7, is secured a casing or housing 9,v

having a cover plate 10, which fits snugly within the sides and ends of the housing, and rests upon abutments 11, in the corners of the housing, as shown. Screws 12, pass through holes in the corners of the cover and also through holes 13, in the bottom of;

the housing, and are screwed into the rail 8, thus rigidly securing the housing to the said rail.

Each end of the housing has a central screwed upon the ends of the bolt and,

against the ends of the housing, and thus rigidly secure the bolt to the ends of the housing.

Upon the bolt 15, is loosely mounted a slide block 17, which is held centrally of the length of the bolt, .by expansion coil springs 18, which surround the bolt, and are held under tension between the ends of the block and the ends of the housing, as clearly shown in Fig. 3. The springs exert equal pressure on each side of the block, and the block is thereby normally lield in a central position on the bolt, as above stated, but-may be moved a short distance in either direction, for a purpose to be hereinafter explained. The block projects out through an elongated slot 10', in the cover 10. bove the hole 19, in the block through which the bolt 15, passes, is a slightly larger hole 20, which is parallel with the hole 19, and this hole 20, is intersected by a threaded aperture 21, which extends down through a short neck 22, formed on the outer end of the block. The vertical rod 7,passes 3 employment of: an a.

loosely through the hole 20, in the'block, which permits the block to slide on the'rod, as the lower sash is raised or lowerechand a thumb screw 23, is secured into the aperture 21, which screw, when turned tightly against 7 the rod, holdsthe sash in any desired posi tion, except for a slight movement ineitherdirection against the tension oi one or the other of the springs "The device thus far described, provides for simply locking the sash in a closed position, or at any point in its upward movement, independently of any alarm system operated by the movement of tlie sash, but the inven' on contemplates the an electric circuit with the casing'), and slide block i7, whereby, when the sash is itnored in either d1rect1on,a circuit closed hrough the bell and an alarm so nded.

, the sameris shown, for convenience of illusin carrying out thisfifeature oi my invention, I secure upon the inner of one s'd of the housing 9, a contactQ l, cons ng or metal strip having spaced abutment lugs 25,

which are provided withthreaded holes. An

insulating strip 26, is interposed between the contact 24:, and the side of the houslng, and insulating rlngs 27 are inserted in holes in the side of the housing and are formed with I flanges which rest a ainst the outside face of the casing, and screws 28 and 29 are passed through the flanged rings 27, and through the strip 26, and screwed into the holes in the contact 24, thus securing the contactto the side of the housing,

The screw 28, is an ordinary headed screw, but the screw 29, is headless and 3am nut 30, is screwed upon it against the flanged ring 27, as shown in lilg. 5.

The slide block 17, is provided with a projecting pin 31, which acts a contact, and

normally lies midway between the lo. 25, of y the contactQ, ant. a binding screw 32, enters I a hole 33, near the outer end or the block.

An electrically operating bell 32 of the a usual construction, is secured at any desired place 111 the house, though in the drawing,

tration, as secured tothe window frame.

A circuit wire 34, is connected at one end to one of the bell terminals, and at its other end it is clamped to the block 17, bythe binding screw 32. A circuit wire 35, is connected ,7

at one end to the remaining bell terminal, and its other end is connected; to one pole 36, of a battery 37. A circuit wire 38, is connected atone end to the other pole 3-9, of the battery, and at its other end it is clamped between the nut 30, and a binding nut 40, on the headless screw 29.

The lower sashmay be'lockedin a closed position or at any point in its upward movement, and when it is desired to raise the sash,

the thumb screw 23, is unscrewedsufiiciently to permit the block 17, to slide freely on the rod 7,; untilthe sash is raisedto the desired bell, arranged inpoint, when'the said screw is turned to clamp the block tightly to the rod 7.

clamped-to the rod '7, remains stationary,

and the movement I oi the sash, which is against the tension of one or the other ot the springs .18, causes one of the .abutments of the contact at, to engage the contact ti, on the block 17, whereby the circuitthrough the bell and battery is closed and an alarm is sounded.

The bell and locking mechanism maybe connected with the house lighting system ii desired, but a battery is preferable, as it eliminates the otherwise necessary wiring at any time, by an unskilled person.

The circuit wires 34 and 38, should be of sufiiCient length to permit the sash to be raised to its full height.

and permits the instalment of the sash lock By attaching the device on one side of the sash, it isnot only outot the way, but is not likely to be seen by .a person attempting to open the window from the outside.

l flllle the deviceis, shown 1n connection with a \VllldOWSElSl'l, itmay also be adapted :l'or use in connection with doors and with the lids of chests andthe like.

l laving described my invention, what I 7 claim as new and desire to secure by Letters Patent, is:

1. In a combined sash lock and burglar alarm, the combination with an upper and. lowersaslnand a depending .rod on said upper sash, of a fixed housing on said lower sash having a circuit terminal contact, a

block slidably mounted in said housing havinga hole through which said depending rod passes, anda circuit terminal contact normally out of engagement with the housing contact, means for locking said block to said rod, whereby movement of the sash causes the contacts to engage and thus close a circuit.

2. In a combined sash lock and burglar alarm, the combmation with an upper and lower sash, and a depending rod on said upper sash, ofa'fiXed housing on said lower sash, a blockslidably, mounted in said housing having a hole through which said depending rod passes, and. a circuit terminal contact, .a thumb screw for locking said block to said -rod,a cirouitterminal contact onsaidhousing, and means for normally holding said block in a position in which its contactis out of engagement with that of the housing,ywhereby, when the sash is moved, the contacts are brought into engagement, thus closing the circuit.

3. In a combined sash lock and burglar alarm, the combination with an upper and lower sash, and a depending rod on said upper sash, of a fixed housing on said lower sash, a bolt in said housing, a block slidably mounted on said bolt, having a hole through which said depending rod passes, and a thumb screw in said block for locking the same to said rod, a circuit terminal contact on the housing and insulated therefrom, a circuit terminal contact on the block, and resilient means for normally holding the block in a position where its contact is out of engagement with the housing contact, said contacts being brought into engagement by the movement of the sash, thereby closing an electric circuit.

4. In a device of the character described, the combination with an upper and lower sash, and a depending rod on said upper sash, of a fixed housing on the lower sash, a bolt secured in said housing, a block slidably mounted on said bolt having a hole through which said depending rod passes, and a thumb screw in said block for locking the same to said rod, expansion coil sprin s on said bolt and interposed between the en s 

